Task creation in calendar not working

From the below website, I could not get any windo to open from left/right clicking on a date.  I tried the white space, the number, the day of the week. Has this feature changed, or is it broken or are there steps that I a missing?

I can drag an existing task to a different date, but not create one directly.

help.wrike.com/hc/en-us/articles/360002559193-Tasks-on-Calendars

From: https://help.wrike.com/hc/en-us/articles/360002559193-Tasks-on-Calendars 

"Create a Task from a Calendar

Create tasks from any Calendar and add that task to a classic Calendar you created.

1. Select the Calendars tab (at the top of the Workspace).
2. Click the date you want to schedule a task for.
3. In the window that opens:
• Enter a task title.
• Select a Folder or Project to tag the task in. You can select more than one.
• Select the classic Calendar where you want to create the task.
4. Click “Create”.

Your task is created as a one-day task scheduled for the date you selected on step 2. The Calendar you created a task on is automatically shown (if it was hidden before)."